package com.wb3.meta.common.utils;

import java.io.*;
import java.util.Base64;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class FileUitls {

    /**
     * 将文件转成base64 字符串
     * @param path 文件路径
     * @return
     * @throws Exception
     */

    public static String encodeBase64File(String path) throws Exception {
        File file = new File(path);
        FileInputStream inputFile = new FileInputStream(file);
        byte[] buffer = new byte[(int) file.length()];
        inputFile.read(buffer);
        inputFile.close();
        return new BASE64Encoder().encode(buffer);

    }

    /**
     * 将base64字符解码保存文件
     * @param base64Code
     * @param targetPath
     * @throws Exception
     */

    public static void decoderBase64File(String base64Code, String targetPath)
            throws Exception {
        byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);
        FileOutputStream out = new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();

    }

    /**
     * 将base64字符保存文本文件
     * @param base64Code
     * @param targetPath
     * @throws Exception
     */

    public static void toFile(String base64Code, String targetPath)
            throws Exception {

        byte[] buffer = base64Code.getBytes();
        FileOutputStream out = new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();
    }
    public static String file2Base64(File file) {
        if(file==null) {
            return null;
        }
        String base64 = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream(file);
            byte[] buff = new byte[fin.available()];
            fin.read(buff);
            base64 = Base64.getEncoder().encodeToString(buff);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fin != null) {
                try {
                    fin.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return base64;
    }
    public static void main(String[] args) {
        try {
            String base64Code = encodeBase64File("D:/0101-2011-qqqq.tif");
            System.out.println(base64Code);
            decoderBase64File(base64Code, "D:/2.tif");
            toFile(base64Code, "D:\\three.txt");
        } catch (Exception e) {
            e.printStackTrace();

        }

    }


}
